import Vue from 'vue';
import { hasRole } from '@/utils/hasRole';

/**
 * @author Mas0n
 * @description 自定义指令v-permissions
 */
Vue.directive('permissions', {
  inserted(el, binding) {
    let { value } = binding;
    if (value) {
      if (!hasRole(value)) {
        el.parentNode && el.parentNode.removeChild(el);
      }
    }
  },
});

/**
 * @author Mas0n
 * @description 自定义指令v-drag
 */
Vue.directive('drag', {
  bind: function (el, binding, vnode) {
    if (
      el.querySelector('.el-dialog__header') &&
      el.querySelector('.el-dialog')
    ) {
      const dialogHeaderEl = el.querySelector('.el-dialog__header');
      const dragDom = el.querySelector('.el-dialog');
      dialogHeaderEl.style.cssText += ';cursor:move;';
      dragDom.style.cssText += ';top:0;';

      const getStyle = (function () {
        if (window.document.currentStyle) {
          return (dom, attr) => dom.currentStyle[attr];
        } else {
          return (dom, attr) => getComputedStyle(dom, false)[attr];
        }
      })();

      dialogHeaderEl.onmousedown = e => {
        const disX = e.clientX - dialogHeaderEl.offsetLeft;
        const disY = e.clientY - dialogHeaderEl.offsetTop;

        const dragDomWidth = dragDom.offsetWidth;
        const dragDomHeight = dragDom.offsetHeight;

        const screenWidth = document.body.clientWidth;
        const screenHeight = document.body.clientHeight;

        const minDragDomLeft = dragDom.offsetLeft;
        const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;

        const minDragDomTop = dragDom.offsetTop;
        const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomHeight;

        let styL = getStyle(dragDom, 'left');
        let styT = getStyle(dragDom, 'top');

        if (styL.includes('%')) {
          styL = +document.body.clientWidth * (+styL / 100);
          styT = +document.body.clientHeight * (+styT / 100);
        } else {
          styL = +styL.replace(/\px/g, '');
          styT = +styT.replace(/\px/g, '');
        }

        document.onmousemove = function (e) {
          let left = e.clientX - disX;
          let top = e.clientY - disY;

          if (-left > minDragDomLeft) {
            left = -minDragDomLeft;
          } else if (left > maxDragDomLeft) {
            left = maxDragDomLeft;
          }

          if (-top > minDragDomTop) {
            top = -minDragDomTop;
          } else if (top > maxDragDomTop) {
            top = maxDragDomTop;
          }

          dragDom.style.cssText += `;left:${left + styL}px;top:${
            top + styT
          }px;`;

          vnode.child.$emit('dragDialog');
        };

        document.onmouseup = function () {
          document.onmousemove = null;
          document.onmouseup = null;
        };
      };
    }
  },
});
